Justin Timberlake appeared on "The Oprah Winfrey Show" on March 27 to promote the new collection from his William Rast clothing line.

A portion of the proceeds from the William Rast America Flag T-shirt will benefit the Cystic Fibrosis Foundation. Now through April 24, 10 percent of the proceeds from the sale of the America Flag T-shirt will be donated to the CF Foundation.